+

WO1999050630A2 - Detecteur de force lineaire - Google Patents

Detecteur de force lineaire Download PDF

Info

Publication number
WO1999050630A2
WO1999050630A2 PCT/US1999/006841 US9906841W WO9950630A2 WO 1999050630 A2 WO1999050630 A2 WO 1999050630A2 US 9906841 W US9906841 W US 9906841W WO 9950630 A2 WO9950630 A2 WO 9950630A2
Authority
WO
WIPO (PCT)
Prior art keywords
spacer
platform structure
base member
sensing device
recited
Prior art date
Application number
PCT/US1999/006841
Other languages
English (en)
Other versions
WO1999050630A3 (fr
Inventor
J. Glenn Gray
Original Assignee
C-Sensor Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by C-Sensor Corporation filed Critical C-Sensor Corporation
Priority to AU31192/99A priority Critical patent/AU3119299A/en
Priority to EP99912939A priority patent/EP1068500A4/fr
Publication of WO1999050630A2 publication Critical patent/WO1999050630A2/fr
Publication of WO1999050630A3 publication Critical patent/WO1999050630A3/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G7/00—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups
    • G01G7/06—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups by electrostatic action
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
    • G01L1/142—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors

Definitions

  • the present invention pertains generally to a force sensing
  • present invention provides a unique device structure which
  • the first is a
  • the second is an elastic mat -type, wherein the
  • elastomer is a sheet of plastic and acts as both a capacitor
  • This mat-type force sensing device typically
  • elastome ⁇ c material used and/or the elastomeric mat is m
  • a movable platform structure coupled to a movable platform structure. More specifically, a
  • perforated elastomeric spacer is positioned between the base
  • a connecting rod may be extended
  • the elastomeric spacer of the present invention has a region which is linearly deformed upon a force being applied to
  • This region is defined as the
  • linear travel distance of the spacer is typically between twenty to thirty percent of the original distance or dimension
  • a property of the elastomeric spacer is that it has a
  • a sensing mechanism is provided for sensing the amount of
  • the sensing mechanism has a movable
  • the structure is such that the
  • the sensing mechanism can be of a type that detects
  • present invention contemplates the sensing mechanism as a
  • variable capacitor having first and second electrodes as the
  • the capacitor is configured to provide a change of capacitance upon movement of the platform
  • An electrical circuit may be connected to the sensing
  • circuit may be connected to the variable capacitor to provide an
  • the electrical circuit may be a typical oscillator circuit
  • sensing device m accordance with the present invention may be
  • Figure 1 is a cross-sectional side view of the present
  • Figure 2 is a perspective view of the present invention
  • Figure 3a is a cross-sectional side view of the present
  • Figure 3b is an cross-sectional side view of the present
  • Figure 4 is a data graph and an inset data table
  • Figure 5 is a cut-away perspective view of an alternative
  • platform structure 14 are mechanically coupled together by way
  • the spacer 16 has a lumen 18 extending throughout the longitudinal center of the spacer 16.
  • a connecting rod 20 extends through the lumen
  • the connecting rod 20 has an adjustment head 22, and a
  • the threaded end 24 passes through a
  • the threaded end 24 then passes through the lumen 18 of the
  • the recess 26 is sufficient to allow the adjustment head 22 to
  • Turning adjustment head 22 will adjust the distance between the base member 12 and the platform structure
  • glue glue, hot melt, adhesives, form fit, staples, screws, rivets, or
  • both sensing elements 32, 34, the base member 12, and portions of the spacer 16 are encased inside the recess
  • circuitry 42 fits into the recess 44 built into the platform
  • circuitry 42 exits from the device 10 through a wiring exit 48.
  • the spacer 16 has the form of a
  • the spacer 16 has nominal dimensions of 0.5 inches m height, 0.6 inches m outer diameter, and 0.2 inches m inner diameter. This
  • spacer 16 can be obtained as a "Urethane Compressing
  • spacer 16 are enabling as long as the thick-wall form factor is
  • washer-shaped sensing element 32, 34 allows the spacer 16 to
  • circuitry 42 and electrical wiring 46 is also clearly contained
  • the movable sensing element 32 is
  • the fixed sensing element 34 is affixed to the inside surface 13 of the base member 12.
  • elements 32, 34 are affixed by either glue, hot melt, adhesive
  • the elastomeric spacer 16 is clearly shown m direct
  • spacer 16 bearing the entire load when force begins to be
  • connecting rod 20 does not transmit load to the spacer 16
  • the elastomeric spacer 16 has two regions which are
  • the first constant is substantially linear over the deformable
  • the deformable region of the spacer 16 is characterized by
  • the non-deformable region of the spacer 16 is characterized
  • the oversized cavity 40 could be located m the base
  • This circuit 42 does
  • the sensing elements 32, 34 are spaced
  • the sensing mechanism may be any type of sensing mechanism.
  • the sensing mechanism may be any type of sensing mechanism.
  • the sensing mechanism is a variable capacitor wherein sensing
  • elements 32, 34 are washer-shaped electrodes juxtaposed to each
  • the preferred embodiment uses air as the dielectric rather than an
  • the spacer 16 is a elastomer or some other substance. Accordingly, the spacer 16
  • electrodes 32, 34 must be electrically insulated from their
  • movable sensing element 32 is a light emitting diode (LED) .
  • the fixed sensing element 34 is a photodetector that would sense
  • the approaching LED by measuring light intensity or some other
  • the movable sensing element 32 is a magnet, and the fixed
  • sensing element 34 is an electro-magnetic detector that would
  • the electrical circuit 42 is a typical oscillator
  • circuit used to cause a frequency change such that the frequency change is inversely proportional to the capacitance change.
  • This electrical circuit 42 does not require any additional
  • circuitry to compensate for device non-lmearity because of the
  • the electrical circuit 42 may have thermal compensation factors
  • region 56 can be extended for higher weight ranges, by
  • elastomer i.e., changing tan ⁇ , impact resilience, hardness, compression, or other visco-elastic properties
  • changing the form factor of the spacer 16 i.e., changing tan ⁇ , impact resilience, hardness, compression, or other visco-elastic properties
  • FIG. 5 illustrates a commercial embodiment of this
  • sensing mechanism can once again be either electrical, electro-
  • platform structure 114 has a movable sensing element 132, such
  • the movable electrode 132 is electrically
  • the fixed sensing element 134 is
  • electrodes 132, 134 are connected to an electrical circuit 142 which contain the common oscillator circuit described above.
  • This circuitry 142 converts the oscillations into factory predetermined units of force or weight

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnetism (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Braking Arrangements (AREA)

Abstract

Ce détecteur de force (10) comporte une pièce d'espacement élastomère (16) couplée à un élément d'assise (12) et à une structure plate-forme (14). Les caractéristiques du matériau composant cette pièce d'espacement (16) font qu'elle se déforme sur un plan linéaire dès application d'une force (54), cette zone de déformation consistant en la distance de parcours linéaire (50) de la pièce d'espacement (16). La zone restante, qui ne subit quasiment pas de déformation supplémentaire relativement à la force (54) appliquée, consiste en la distance non déformable (58) de la pièce d'espacement (16). Un mécanisme de détection constitué directement dans le dispositif comporte un moyen de détection de la distance de parcours linéaire (50) selon différentes applications de force (54). Plus précisément, ce mécanisme de détection comporte une partie mobile et une partie fixe (32, 34) séparées par un intervalle égal à la distance de parcours linéaire (50). Ce mécanisme de détection, qui peut être du type détectant des propriétés ou des manifestations électromagnétiques, électro-optiques ou électriques, quel qu'en soit le genre, est, de préférence, un condensateur variable pourvu de deux électrodes (32, 34) formant la partie mobile et la partie fixe (32, 34). Il est possible, en dernier lieu, de connecter un circuit électrique (42) au mécanisme de détection afin de mesurer le changement survenu subi par un signal électrique en réaction directe avec la modification de la distance existant entre la partie mobile et la partie fixe (32, 34).
PCT/US1999/006841 1998-03-30 1999-03-29 Detecteur de force lineaire WO1999050630A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU31192/99A AU3119299A (en) 1998-03-30 1999-03-29 Linear force sensing device
EP99912939A EP1068500A4 (fr) 1998-03-30 1999-03-29 Detecteur de force lineaire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/052,338 1998-03-30
US09/052,338 US6026694A (en) 1998-03-30 1998-03-30 Linear force sensing device

Publications (2)

Publication Number Publication Date
WO1999050630A2 true WO1999050630A2 (fr) 1999-10-07
WO1999050630A3 WO1999050630A3 (fr) 2000-01-06

Family

ID=21976977

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1999/006841 WO1999050630A2 (fr) 1998-03-30 1999-03-29 Detecteur de force lineaire

Country Status (4)

Country Link
US (1) US6026694A (fr)
EP (1) EP1068500A4 (fr)
AU (1) AU3119299A (fr)
WO (1) WO1999050630A2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6672168B2 (en) 2001-09-24 2004-01-06 Andrew Braugh Multi-level machine vibration tester marker pen
US20090295364A1 (en) * 2005-08-10 2009-12-03 President And Fellows Of Harvard College Methods of Using a Nanotransfer Printing Stamp Having Conductively Coated Sidewalls
WO2016060558A1 (fr) 2014-10-14 2016-04-21 Eminent Products B.V. Dispositif et procédé pour la détermination d'une quantité au moyen d'une mesure capacitive

Families Citing this family (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2448166A1 (fr) 2001-06-22 2003-01-03 Hill-Rom Services, Inc. Cellule dynamometrique comportant un dispositif de mesure d'intervalle
US20030066362A1 (en) * 2001-08-29 2003-04-10 Lee Shih Yuan Seat belt tension sensor
US6829952B2 (en) * 2002-02-13 2004-12-14 Automotive Systems Laboratory, Inc. Seat belt tension sensor
SG103845A1 (en) * 2002-02-15 2004-05-26 Sony Electronics Singapore Pte Improved force sensing device
CA2476708A1 (fr) * 2002-02-21 2003-08-28 Intelligent Mechatronic Systems, Inc. Cellule de mesure (prechargee) pour siege de vehicule a alignement lateral et angulaire
US6843143B2 (en) * 2002-06-07 2005-01-18 Automotive Systems Laboratory, Inc. Seat belt tension sensor
US6768958B2 (en) * 2002-11-26 2004-07-27 Lsi Logic Corporation Automatic calibration of a masking process simulator
US7353713B2 (en) * 2003-04-09 2008-04-08 Loadstar Sensors, Inc. Flexible apparatus and method to enhance capacitive force sensing
US7047818B2 (en) * 2003-04-09 2006-05-23 Loadstar Sensors, Inc. Capacitive force sensing device
US7187185B2 (en) * 2004-09-29 2007-03-06 Loadstar Sensors Inc Area-change sensing through capacitive techniques
US7921728B2 (en) * 2003-04-09 2011-04-12 YPoint Capital, Inc Flexible apparatus and method to enhance capacitive force sensing
US7451659B2 (en) * 2004-09-29 2008-11-18 Loadstar Sensors, Inc. Gap-change sensing through capacitive techniques
US7570065B2 (en) * 2006-03-01 2009-08-04 Loadstar Sensors Inc Cylindrical capacitive force sensing device and method
US6951139B2 (en) * 2003-12-05 2005-10-04 The Goodyear Tire & Rubber Company Tire sensor and method of assembly
US7176391B2 (en) * 2004-09-13 2007-02-13 Hill-Rom Services, Inc. Load cell to frame interface for hospital bed
JP4762611B2 (ja) * 2005-06-17 2011-08-31 株式会社Ｉｃｓｔ 荷重センサー、体重計測器
US20080250865A1 (en) * 2007-04-11 2008-10-16 Silverbrook Research Pty Ltd Capacitive force sensor having saturated output at minimum capacitance
US8966999B2 (en) * 2011-06-17 2015-03-03 Microsoft Corporation Pressure sensor linearization
US9157786B2 (en) * 2012-12-24 2015-10-13 Fresenius Medical Care Holdings, Inc. Load suspension and weighing system for a dialysis machine reservoir
JP5497969B1 (ja) * 2013-07-17 2014-05-21 株式会社ワコー 力覚センサ
WO2015077102A1 (fr) 2013-11-25 2015-05-28 Oil States Industries, Inc. Procédé et système de surveillance de la santé d'éléments souples élastomères composites
KR102440208B1 (ko) * 2015-09-03 2022-09-05 엘지이노텍 주식회사 압력 감지 소자
FR3061319B1 (fr) * 2016-12-23 2019-05-31 Dav Interface pour vehicule automobile et procede de montage
EP4530586A2 (fr) 2021-06-28 2025-04-02 Melexis Technologies SA Capteur de force avec cible sur boîtier de semi-conducteur
WO2023275006A1 (fr) * 2021-06-28 2023-01-05 Melexis Technologies Sa Balance à détection de force à cible
DE102023110704A1 (de) * 2023-04-26 2024-10-31 Altosens GmbH Unterlegscheibe zum Kraftmessen und Kraftverteilen bei einem Verbinden eines Verbindungsmittels mit einem zu verbindenden Teil

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1453934A (en) * 1973-01-04 1976-10-27 Probe Eng Co Ltd Electrical weighing systems
CH609774A5 (fr) * 1977-01-21 1979-03-15 Semperit Ag
JPS53127958A (en) * 1977-04-14 1978-11-08 Toray Ind Inc Coil spring made of fiber reinforced plastics
US4585082A (en) * 1984-08-17 1986-04-29 Harrington Richard H Weight scale utilizing a capacitative load cell
DE68900857D1 (de) * 1988-05-17 1992-04-02 Aran Eng Dev Ltd Tragbare waage.
DE3838990C1 (fr) * 1988-11-18 1990-05-23 Jakob Maul Gmbh, 6123 Bad Koenig, De
DE59101725D1 (de) * 1990-10-08 1994-06-30 Wirth Gallo Messtechnik Lastmessvorrichtung.
DE4125210A1 (de) * 1991-07-30 1993-02-04 Roesle Metallwarenfabrik Gmbh Waage, insbesondere fuer kuechen- und laborbedarf
ES2073903T3 (es) * 1991-10-31 1995-08-16 K Tron Tech Inc Disposicion dinamometrica.
US5321209A (en) * 1992-12-17 1994-06-14 Tif Instruments, Inc. Electronic weighing device
US5400661A (en) * 1993-05-20 1995-03-28 Advanced Mechanical Technology, Inc. Multi-axis force platform
TW350026B (en) * 1995-07-28 1999-01-11 Hokushin Ind Pressure sensor
SE511634C2 (sv) * 1996-05-07 1999-11-01 Samba Sensors Ab Anordning för elektrooptisk mätning av tryck
US5900592A (en) * 1997-08-29 1999-05-04 Lockheed Martin Energy Research Corp. Load sensing system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6672168B2 (en) 2001-09-24 2004-01-06 Andrew Braugh Multi-level machine vibration tester marker pen
US20090295364A1 (en) * 2005-08-10 2009-12-03 President And Fellows Of Harvard College Methods of Using a Nanotransfer Printing Stamp Having Conductively Coated Sidewalls
US8529784B2 (en) * 2005-08-10 2013-09-10 President And Fellows Of Harvard College Electrically-conductive and semi-conductive films
WO2016060558A1 (fr) 2014-10-14 2016-04-21 Eminent Products B.V. Dispositif et procédé pour la détermination d'une quantité au moyen d'une mesure capacitive
NL1040996B1 (nl) * 2014-10-14 2016-09-09 Eminent Products B V Inrichting en werkwijze voor het bepalen van een grootheid middels een capacitieve meting.

Also Published As

Publication number Publication date
AU3119299A (en) 1999-10-18
EP1068500A4 (fr) 2001-11-07
EP1068500A2 (fr) 2001-01-17
WO1999050630A3 (fr) 2000-01-06
US6026694A (en) 2000-02-22

Similar Documents

Publication Publication Date Title
US6026694A (en) Linear force sensing device
US7047818B2 (en) Capacitive force sensing device
US6006386A (en) Capacitive transducer
US9377372B2 (en) Small-sized load sensor unit
US5054323A (en) Pressure distribution characterization system
US7451659B2 (en) Gap-change sensing through capacitive techniques
US7322246B2 (en) Pressure sensor with pressure translation
US4738146A (en) Piezoresistive force-measuring element and its use for determining forces acting on a component
CA1125879A (fr) Correction d'erreurs lineaires dans un transducteur de mesure de position
US7353713B2 (en) Flexible apparatus and method to enhance capacitive force sensing
CN108731850B (zh) 电容式压力传感器及电子笔
US6225576B1 (en) Shear beam load cell
CN101568810A (zh) 秤
CN108604138B (zh) 压力传感装置及具有该压力传感装置的电子设备
US6919521B2 (en) Pressure sensor
US6556024B2 (en) Capacitance type load sensor
US20090205437A1 (en) Flexible apparatus and method to enhance capacitive force sensing
US20220334008A1 (en) Force gauge
US20090211377A1 (en) Force sensors
CN218916617U (zh) 一种压力传感器及压力传感器系统
US12050142B2 (en) Effective gauge factor utilizing integrated millivolt amplifier for strain gauge applications
Radosavljević et al. Micro force sensor fabricated in the LTCC technology
US8082804B2 (en) Load measuring transducer using induced voltage for reducing measuring errors and load measuring system using the same
US20090120198A1 (en) Gap-change sensing through capacitive techniques
EP0681261B1 (fr) Transducteur pour dispositif de pointage utilisant des résistances à film épais comme jauges de contrainte

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW SD SL SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
AK Designated states

Kind code of ref document: A3

Designated state(s): AE AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH GM KE LS MW SD SL SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
NENP Non-entry into the national phase

Ref country code: KR

WWE Wipo information: entry into national phase

Ref document number: 1999912939

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1999912939

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWW Wipo information: withdrawn in national office

Ref document number: 1999912939

Country of ref document: EP

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载